Means for determining the relative angular velocity and phase of revolving bodies.



C. A. PARSONS, S. S. COOK & L. M. DOUGLAS MEANS FOR DETERMINING-THE RELATIVE ANGULAR VELOCITY AND PHASE 0F REVOLVING BODIES.

APPLICATIQN FILED DEC.13, l9l5- 1,207,072. B Patented Dec. 5,1916.

3 SHEETSSHEET I.

. I C. A. PARSONS, S. S. COOK & L. M. DOUGLAS- v MEANS FOR DETERMINING THE RELATIVE ANGULAR VELOCITY AND PHASE 0F REVOLVING BODIES.

APPLICATION FILED DEC.13. m5.

1,207,072. Patented Dec. 5,1916.

3 SHEETS- SHEET 2.

Stanley 5'. 0001:, g,

v C. A. PARSONS, S. S. COOK & L. M. DOUGLAS. MEANS FOR DETERMINING THE RELATIVE ANGULAR VELOCITY AND PHASE OF REVOLVING BODIES.

APPLICATION FILED DC.13. I915.

1,207,072. I Patented Dec. 19m.

Inventors.-

Char-Zea A.Par.s'orw, dtwralgy J. 0001:, 2/

' T STAWENT OFFICE.

CHARLES ALGERNON PARSONS, STANLEY SMITH COOK, AND LOUIS MORTIMER DOUGLAS, 01? WALLSEND, ENGLAND; SAID COOK AND DOUGLAS ASSIGNORS TO SAID rmsons.

MEANS FOR DETERMINING THE RELATIVE ANGULAR VELOCITY AND PHASE OF REVOLVING BODIES.

e To all whom it mag concern Be it known that we, CHARLES ALGERNoN PARSONS, K. C. B., STANLnrSMrrH CooK,

- and LoUIs MORTIMER DoUonAs, all subjects of the King of Great Britain and Ireland, residing at Turbinia 'Works', Wallsend, in the county of Northumberland, England, have invented certain new and useful Improvementsin and Relating to Means for Velocity and Phase of Revolving Bodies, of which the following is a specification.

The present invention relates to means for determining and phase of revolvingbodies, and relates more particularly to devices of this nature of the type in which slotted elements rotated by the'revolving bodies arearranged so that light from a suitable source can pass through the intersections of the slots.

The object of the present invention is to provide devices of. the type indicated which shall be suitable among other, uses for directly mounting upon the revolving bodies while providin a convenient and easily inspected indicatlon of the relative speed and phase. ff.

The present invention consists in a device of the type indicated in -which the s lotted. elements are formed asconcentric cylinders or concentric cones, the "slots in the respective cylinders or cones being relatively inclined, making diiferent angles with the axisof rotation in the difierent cylinders or cones. y I

The invention v also .consists in the combination of a device for determining relative angular velocity and phase embodying the' present invention with a claw coupling. The invention further. consists in the improved devices for determining the relative angular velocity and phase of revolving bodies hereinafter described.

Referring to the ings:Figure 1 is a sectional elevation through a simple form of device embodying the present invention; Fig. 2 is a sectional view of Fig. 1, taken on two planes, the right half on the plane AA, the left half on the plane 'B-B of Fig. 1; Fig. 3 is a developed view of the peripheries of the two slotted cylinders; Fig. 4 shows the combithe relative angular velocity accompanying draw- Patented Dec. 5, 1916.

' Application filed December 13, 1915. Serial No. 66,668.

nation of -a device according to the present invention with a claw coupling; Fig. 5 illustrates a further form in which a substantially conical mirror is employed to throw light from a suitable source through the slotted members; Fig. 6 a detail section on the line CC of Fig. 5; Fig. 7 illustrates a further form in which the outer slotted cylindrical member is driven by sliding pins from the coupling sleeve in order to avoid axial movement of the outer slotted member; Fig. 8 illustrates a form in which the slotted cylindrical members are rotated through gearing from the parts of the cou pling to which they are respectively related;

Fig. 9 is a sectional new on the line D- of Fig. 8; while Fig. 10 is a plan view of the casing containing the slotted members.

In carrying the present invention into effect according to one form (see Figs. 1-3) and as applied, for example, to a pair of coaxial shafts a and 12 carrying claw couplings, two cylindrical or cup-shaped members 0 and d are provided. One of these members 0 is attached to a coupling sleeve 0 on one of the shafts a, the other member d is attached to the other shaft 1), and its diameter is such that its cylindrical portion can freely rotate within and preferably out of contact with the cylindrical portion of the first member 0.

In the cylindrical portions of both members slots or slits f, g' are provided. These slots are preferably formed with beveled edges. The slots 9 in the inner" member d' are formed parallel with the axis of rotation, while the slots 1' in the outer member 0 are inclined to the axis of rotation. Within the cylindrical portions of the slotted members a suitable source of light, for instance, an elongated bulb incandescent electric lamp his supported. It is to be understood that the source of light does not rotate with the cylindrical members, but is preferably supported upon a casing jsurrounding the cylindrical members and the claw coupling. Further, the source of light may be placed at any convenient distance and position and.

. cylindrical members. In order to determine when the rotating bodies are in correct relative phase it is necessary to know the position of the line of light which corresponds to the correct phase. This position is deter.-

- mined when the bodies are at rest and in her 0? is conveniently their proper relative positions, and this correct position of the line of light is indicated to the operator while the parts are rotating by means of a reference line of light formed by a series of apertures in the cylindrical portion of the slotted members, or by a line delineated upon the periphery of the outer cylindrical member as shown at'lc, Fig. 3, for example.

It will be seen that the slotted members may be both directly secured upon the'two coaxial shafts or one may be secured upon one of the shafts while the other is secured upon a longitudinal sliding portion of the claw coupling, as shown in Figs. 1-6, or they may be rotated by gearing between them and the two members of the claw coupling respectively, as shown in Figs. 8-10, or driven at the same speed as the shafts by means of pins sliding in holes in one of the members, as shown in Fig. 7.

In carrying the present invention into effect according to a modified construction (see Fig. 4) as applied to a coupling of the type in which each of the shafts to be coupled carries claw members Z, m which are coupled by a clutch sleeve n, the outer slotted cylindrical member 0 may. conveniently be attached to the moving clutch sleeve n. The inner slotted cylindrical memmounted by a flange upon the claw carrying piece Z of one of the shafts. The slots 9 in this inner member are made parallel to the axis of rotation and considerably longer than the slots f in the outer cylindrical member 0 to allow for the longitudinal movement of the outer member over the inner when the clutch sleeve n is operated. I

In order to diffuse the light from the lamp h or other source of light, it is desirable to interpose between the source of light and. the inner periphery of the inner slotted member a curved screen 0 of frosted glass or similar material.

In the modification shown in Fig. 5 the inner slotted member 03 is carried on the coupling sleeve n by means of a flange s. The outer slotted member 0 is provided with an inturnedflange t by which it is attached to the member Z. Upon the flange t a ring uwith a beveled edge is mounted, the beveled edge belng provided with a mirror '0 which may be made up of a series of flat portions of mirror. The flange 8 has apertures w through which light from the lamps it can fall on the mirror 7) and be reflected through the intersections of the slots 9, f. A difiuser 0 may be held in the lamp casing an.

In the modification shown in Fig. 7 the outer slotted member 0 does not move axially but is retained between shoulders upon the inner member (1. One of the shoulders is made detachable for the purpose of assem-- bling the parts. In this form the outer member 0 is driven by pins p carried by a flange. These pins engage holes inv a flange g on the sleeve n. The overhung portion of the sleeve-n in Figs. 5 ported by her Z. the contacting surfaces of c and d.

In the modifications described with reference to Figs. 1-7, it is obvious that the cylindrical members rotate at the same speed as the members to which they are attached. It is therefore necessary in order to correctly indicate the relative phase that the number of slots in the slotted members should. be either equal to the number of claws in the engaging-portion of the coupling or a submultiple of this number. required to clutch the shafts in oneposition only one slot is necessary in each member.

It is to be noted that in certain of the forms, for example, Fig. 7, the inclination of the two sets of slots may be reversed, that is to say, the outer set may be parallel with the axis of rotation while the inner set a flange r sliding on the mem- Or, if it is only and 7 maybe sup- Suitable holes and ducts lead oil to are inclined to the axis of rotation. Again,

it is only required to clutch the shafts in one or two positions the circumferential pitch of the slots may be uneven, or a diflerent number of uniformly pitched slots may be provided in each member.

Figs. 810 show a modification in which the sloted members are rotated by gearing from the two members Z and m of the claw coupling. Pinions y are provided on land m and drive the wheels .2 on the shafts 2 through the idler wheels? The sleeve 72 is supported in the disengaged position by flanges 4 and 5.

In cases where the gearing is such asto rotate the members 0 and d at the same speed as Z and m, the number of slots may be made the same as the number of claws on Z .and m, or a sub-multiple of this number. But wherethe speeds of c d and Z m are not the same, the speed of 0 d should be made a multiple or' sub-multiple of that of l m, and the number of slots varied to suit the relation between the speeds. ,In Fig. 8'

the speed of c d is twice the-speed of I m, and therefore the number of slots in c d can be half the number of claws in l m.

The constructions described lend them-- selves to a compact and simple arrangement and can conveniently be applied near the casing covering the coupling. v

It will be, understood that conical slotted members may be substituted for the cylindrical members referred to.

Although the particular applications described refer to the determination of angu bodies comprising two concentric cylindersprovided with elong'ated apertures and rotated in the same direction, each by one of the bodies, the said apertures in the respective cylinders being relatively inclined, making different angles to the axis of rotation in thetwo cylinders, in combination with intersections of said slots.

a source of light so arranged that light can pass through the intersections of the said apertures.

2. In means for determining the relative angular velocity and phase of two revolving bodies, in combination, two rotatable adjacent concentric cylinders, axial slots in one of said cylinders, slots in the other of said cylinders inclined to the axial direction, and means for causing light to pass through the 3. In means for determining the relative angular velocity and phase of two co-axial rotating shafts in combination, two concentric cylinders, elongated apertures in said cylinders so arranged that they progressively intersect on relative rotation, of the cylinders, a source of light so arranged that light can pass through. the intersections of said apertures, clutch means on the adjacent. end of each of saidshafts, means convey ing rotary motion from one of said shafts to one of said cylinders and from the other of said shafts tothe other of said cylinders.

4. In means for determining the relative angularvelocity and phase. of two co-axial shafts in combination, two concentric cylinders co-azn'al with said shafts, elongated apertures in eachof said cylinders, the apertures in the respective cylinders being relatively inclined, a source of light so arranged that light can pass through the intersections cent ends of each of said shafts and in prox} imity' to said cylinders, a sliding member adapted to connect and' disconnect said clutch means, means adapted to connect one of said cylinders with one of said shafts and means adapted to connect the other of said cylinders with said sliding member.

5. Means for determining the relative an gular velocityv andphase of two revolving bodies comprising two concentric cylinders provided with elongated apertures and rotated in the same direction, each by one'of the bodies, the said apertures in the respective cylinders being relatively inclined, mak

ing different angles to the axis of rotation-in the two cylinders, in combination with a of said apertures, clutch means on the adjasource of light so arranged that light can pass through the intersections of the said apertures, means conveying rotary motion from one of said bodies to one of saidcylinv ders and from the other of saidbodiesto the ing trains of toothed gearing.

6. In means for determining angular velocity and phase of twoco-axial shafts in combination, two concentric cylin- .90 other of said cylinders," said means compris- 1 the relative ders co-axial with said shafts, elongated apertures in. each of said cylinders, the aper-- tures in the respective cylinders being "rela-.' tively inclined, a source of llght so arranged that light can pass through the intersections 10o of said apertures, clutch means on the adjacent ends of each of said 'shafts-a'ndin proximity to said cylinders, a sliding mem-" ber adapted to connect and disconnect said clutch means, means adapted to connect one of said-cylinders with one of sald shafts and means adapted to connect the other of said:

cylinders with said sliding member, said means comprising pins carried by said last mentioned cylinder and adapted to slidingly engage holes in the, said sliding member.

In testimony whereof, we have afiixedour signatures.

STANLEY SMITH (K.

LOUIS MORTIMER DOUGLAS.

CHARLES ALGERNON PARSQNS, 

